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emmainna [20.7K]
3 years ago
10

Evaluating the Six Trigonometric Function Question attached

Mathematics
2 answers:
ziro4ka [17]3 years ago
6 0
If tan theta is -1, we know immediately that theta is in either Quadrant II or Q IV.  We need to focus on Q IV due to the restrictions on theta.

Because tan theta is -1, the ray representing theta makes a 45 degree angle with the horiz axis, and a 45 degree angle with the negative vert. axis.  Thus the hypotenuse, by the Pythagorean Theorem, tells us that the hyp is sqrt(2).
Thus, the cosine of theta is adj / hyp, or +1 / sqrt(2), or [sqrt(2)]/2

The secant of theta is the reciprocal of that, and thus is

   2            sqrt(2)
---------- * ------------ = sqrt(2)    (answer)
 sqrt(2)      sqrt(2)  
IceJOKER [234]3 years ago
5 0
3π/2 < θ < 2π    is another way to say θ is in the IV quadrant.

now, the only time the tangent is 1 or -1, is right in the middle of the quadrant, in this case, that'd be at θ = 7π/4.

\bf tan\left( \frac{7\pi }{4} \right)=\cfrac{\qquad \stackrel{sine}{\frac{-\sqrt{2}}{2}}\qquad }{\stackrel{cosine}{\frac{\sqrt{2}}{2}}}\implies -1&#10;\\\\\\&#10;\textit{now, let's recall that }sec(\theta )=\cfrac{1}{cos(\theta )}\qquad therefore

\bf sec\left( \frac{7\pi }{4} \right)\implies \cfrac{1}{cos\left( \frac{7\pi }{4} \right)}\implies \cfrac{1}{\frac{\sqrt{2}}{2}}\implies \cfrac{\frac{1}{1}}{\frac{\sqrt{2}}{2}}\implies \cfrac{1}{1}\cdot \cfrac{2}{\sqrt{2}}\implies \cfrac{2}{\sqrt{2}}&#10;\\\\\\&#10;\stackrel{\textit{rationalizing the denominator}}{\cfrac{2}{\sqrt{2}}\cdot \cfrac{\sqrt{2}}{\sqrt{2}}\implies \cfrac{2\sqrt{2}}{(\sqrt{2})^2}\implies \cfrac{2\sqrt{2}}{2}\implies \sqrt{2}}&#10;
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The United States five-dollar bill are 155.956 mm long and 66.294 wide. A stack of these bills fits inside a 156 x 66.3 x 66.3 m
maxonik [38]

Answer:

A) $5 × 25 = $75

B) 37.69%

Step-by-step explanation:

The dimension of five dollar bill:

Length = 155.956mm

Width = 66.294

Volume of box being occupied by 5 dollar bill = 258,473.68mm^3

Dimension of box :

156 x 66.3 x 66.3 mm

If volume of the 5—dollar bill is 258,473.68mm^3

Then, the Thickness of the five dollar stack equals :

Volume = Length × width × height

258,473.68mm^3 = 155.956mm × 66.294 × height

258,473.68 = 10338.947064 × h

h = (258473.68/10338.947064)

h = 25.000000003288 = 25

Therefore, the amount of money in the box is:

$5 × 25 = $75

Percentage of box volume taken up by $5 bill

Volume of the box:

156 x 66.3 x 66.3 mm = 685727.6399mm^3

Volume of box being occupied by 5 dollar bill = 258,473.68mm^3

(258,473.68 / 685727.6399) × 100

=37.69%

4 0
3 years ago
Handsome Jack is buying a pony made of diamonds. The price of the pony is P dollars, and Jack also has to pay
Leya [2.2K]

Answer:

.25(P), or P/4

Step-by-step explanation:

Depending on what P, the answer should be .25(P)

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3 years ago
Sage and Tom started the month with the same number of talk minutes on their cell phones. Sage talked for 7 minutes with her dad
AlekseyPX

Answer:

Step-by-step explanation:

x=number of talk mnutes

Sage uses 7 minutes = x-7

Tom uses 4 and 3 minutes = x-4-3    = x-7

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3 years ago
Read 2 more answers
60 points !! i'll mark brainliest as well . don't scam or i'll report thanksss :)
sp2606 [1]

Answer:

2, 6, 28, 358.01

Step-by-step explanation:

We have to find the fractions of whole numbers.

Number 1:

\frac{1}{5} of 10 = \frac{1}{5} \times (2 \times 5) = 2 (Answer)

Number 2:

\frac{2}{3} of 9 = \frac{2}{3} \times (3 \times 3) = 2 \times 3 = 6 (Answer)

Number 3:

\frac{7}{8} of 32 = \frac{7}{8} \times (4 \times 8) = 7 \times 4 = 28 (Answer)

Number 4:

3 \times 10^{2} + 5 \times 10^{1} + 8 \times 10^{0} + 1 \times \frac{1}{10^{2} }

= 3 \times 100 + 5 \times 10 + 8 \times 1 + \frac{1}{100} {Since a^{0} = 1}

= 300 + 50 + 8 + 0.01

= 358.01 (Answer)

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